JP2015035122A - Touch panel and liquid crystal display device provided with touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reduction in visibility of an image displayed via a touch panel.SOLUTION: The touch panel 42 of the present invention includes a plurality of scan electrodes, a plurality of detection electrodes 38, and a plurality of electrically independent dummy electrodes 39. The detection electrodes 38 cross the plurality of scan electrodes, are formed on a surface different from the surface having the scan electrodes, and include a plurality of polygonal holes 38b that have five or more edges as the plan view shape and are arranged mutually separately in a matrix shape. The dummy electrodes 39 are formed between adjacent detection electrodes, and are made of the same material as that of the detection electrodes. The plan view shape of each of the plurality of dummy electrodes is a polygonal hole shape.

Description

  The present invention relates to a touch panel and a display device including the touch panel.

  In recent years, a touch panel that detects a position where a finger, a dedicated pen, or the like is in contact has been developed. As such a touch panel, for example, a capacitance method is known that detects a change in capacitance of a portion where a contact pressing operation (hereinafter referred to as touch) is performed. In an IPS (In Plane Switching) type liquid crystal display device, in an in-cell type touch panel using a common electrode for liquid crystal display as a scan electrode for touch detection, the scan electrode and the detection electrode crossing the scan electrode are arranged in a matrix. Is provided.

  Patent Document 1 discloses a touch panel having a rhombic lattice-shaped detection electrode in which a plurality of parallel conductor lines intersect at a predetermined angle. In such a touch panel, the first electrode that is the scanning electrode and the second detection electrode that is the detection electrode intersect with each other at a predetermined angle, so that the conductor wires constituting the first electrode and the second electrode are A square mesh pattern is formed in plan view.

JP 2011-248722 A

  In the touch panel described in Patent Document 1, since a plurality of conductor lines are arranged in parallel, the side surfaces of the plurality of conductor lines reflect light in the same direction due to light emission from the pixels. As a result, the detection electrode pattern is visible from the outside of the display device. Further, in the display device described in Patent Document 1, since the square mesh pattern is continuously adjacent, interference fringes (hereinafter referred to as moire) in which halftone dots that are fine patterns appear continuously cannot be prevented. . As a result, there is a concern that the visibility of the image displayed via the touch panel may be reduced.

  This invention is made | formed in view of such a situation, Comprising: It aims at prevention of the fall of the visibility of the image displayed via a touch panel.

Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  (1) The touch panel of the present invention includes a plurality of scan electrodes and a plurality of polygons having five or more corners in a plan view shape formed on a surface different from the scan electrodes intersecting the plurality of scan electrodes. A plurality of detection electrodes in which holes are arranged apart from each other in a matrix, and a plurality of electrically independent dummy electrodes formed between the adjacent detection electrodes and made of the same material as the detection electrodes And each of the plurality of dummy electrodes has a shape in plan view that is the shape of the polygonal hole.

  (2) In the touch panel of the present invention, in (1), the plurality of polygonal holes of the detection electrodes and the plurality of dummy electrodes may be a continuous and uniform arrangement.

  (3) In the touch panel of the present invention, in (1) or (2), the polygon may be visually recognized as a circular shape when the polygon increases the number of corners.

  (4) In the touch panel of the present invention, in any one of (1) to (3), in the detection electrode formation region that is a region where the detection electrode is formed, the plurality of polygons with respect to the area of the detection electrode The area ratio of the holes may be not less than two-thirds and not more than three-half.

  (5) In the touch panel of the present invention, in any one of (1) to (4), the distance between the centers of adjacent polygons may be equal.

  (6) The touch panel of the present invention is the electrode according to any one of (1) to (5), wherein the plurality of polygonal holes are formed outside a display region where the detection electrode is formed. A shield electrode may be further provided.

  (7) In the liquid crystal display device of the present invention, alignment is controlled by the touch panel according to any one of (1) to (6), a pixel electrode that forms an electric field using the scanning electrode as a counter electrode, and the electric field. A liquid crystal.

  According to any one of the above (1) to (7), the reflection of light and the generation of moire in the polygonal holes in the detection electrodes and the side surfaces of the dummy electrodes, compared with the touch panel or liquid crystal display device not having this configuration. Is suppressed. For this reason, the fall prevention of the visibility of the image displayed via a touch panel is realizable.

It is a disassembled perspective view of the liquid crystal display device which has a touchscreen based on embodiment of this invention. FIG. 2 is a schematic cross-sectional view taken along the line II-II of the liquid crystal display device shown in FIG. FIG. 3 is a partially enlarged view of region III of the touch panel shown in FIG. 4 is a partially enlarged view of an IV region of the touch panel shown in FIG. FIG. 5 is a partially enlarged view showing a modification of the touch panel according to the present embodiment in the same field of view as FIG. FIG. 6 is a partially enlarged view showing a modification of the touch panel according to the present embodiment in the same field of view as FIG. FIG. 7 is a partially enlarged view showing a modification of the touch panel according to the present embodiment in the same field of view as FIG. FIG. 8 is a partially enlarged view showing a modification of the touch panel according to this embodiment in the same field of view as FIG. FIG. 9 is a partially enlarged view showing a modification of the touch panel according to the present embodiment in the same field of view as FIG. FIG. 10 is a partially enlarged view showing a modification of the touch panel according to the present embodiment in the same field of view as FIG. FIG. 11 is a partially enlarged view of the XI region of the touch panel shown in FIG. 12 is a partially enlarged view of the XII region of the touch panel shown in FIG.

  Hereinafter, the touch panel and the display device according to the present embodiment will be described based on the drawings with the liquid crystal display device 1 as an example. Note that the drawings referred to in the following description may show the features that are enlarged for convenience in order to make the features easier to understand, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent. In addition, the materials and the like exemplified in the following description are examples, and each component may be different from them, and can be changed and implemented without changing the gist thereof.

  FIG. 1 is an exploded perspective view of a liquid crystal display device 1 having a touch panel according to an embodiment of the present invention. As shown in FIG. 1, the liquid crystal display device 1 includes a liquid crystal display panel 33 and a front panel 46 having a display area D and a non-display area E. For convenience of explanation, the description of a part of the configuration of the liquid crystal display device 1 is omitted in FIG.

  The liquid crystal display panel 33 is, for example, an IPS (In-Plane Switching) liquid crystal display panel, and includes the first substrate 10 and a touch panel 42. A first flexible circuit board 2a is connected to a region corresponding to the non-display region E in the upper surface 10a of the first substrate 10, and a driver IC (Integrated Circuit) 3 is further provided. The driver IC 3 is an IC disposed on the first substrate 10 to which image data is supplied from the outside of the liquid crystal display device 1 via the first flexible circuit board 2a. When the image data is supplied, the driver IC 3 supplies a voltage signal applied to each pixel via the common wiring 58 to the scanning electrode 30 and a pixel electrode 34 described later.

  The touch panel 42 includes a plurality of scanning electrodes 30, the second substrate 12, and a plurality of detection electrodes 38. The scanning electrode 30 is provided in a region corresponding to the display region D of the upper surface 10a of the first substrate 10 so as to extend in the direction X with a space therebetween.

  The second substrate 12 is disposed on the first substrate 10. In the region corresponding to the display region D on the upper surface 12a of the second substrate 12, for example, a plurality of detection electrodes 38 extending in the direction Y are provided at intervals. The direction Y may be a direction that intersects the direction X, but is preferably orthogonal to the direction X.

  The ends in the Y direction of the plurality of detection electrodes 38 formed in the region corresponding to the display region D are each connected to the terminal 40, and the Y of the detection electrode 38 formed in the region corresponding to the non-display region E The end in the direction is connected to the shield terminal 41. A dummy electrode 39 is formed between adjacent detection electrodes 38. Detailed configurations of the detection electrode 38 and the dummy electrode 39 will be described later.

  A second flexible circuit board 2b is connected to a region corresponding to the non-display region E in the upper surface 12a of the second substrate 12. The second flexible circuit board 2b is provided for electrical connection between the detection electrode 38 and an external device, and a part of the second flexible circuit board 2b is connected to the first flexible circuit board 2a.

  A front panel 46 is disposed on the second substrate 12. The front panel 46 is a member for protecting the liquid crystal display panel 33. The display area D of the front panel 46 has translucency, and the lower surface of the non-display area E is covered with a black matrix BM.

  Next, details of the configuration of the display area D of the liquid crystal display device 1 will be described. 2 is a schematic cross-sectional view taken along the line II-II of the liquid crystal display device 1 shown in FIG.

  The first substrate 10 is an insulating substrate such as glass, and is a member on which the circuit layer 11, the scan electrode 30, and the pixel electrode 34 are sequentially formed on the upper surface 10 a.

  The circuit layer 11 is a layer in which a thin film transistor 18, a first insulating film (gate insulating film) 22 and an electric wiring (not shown) are formed, and is provided for driving the pixel electrode 34. The thin film transistor 18 is provided for each pixel P on the first substrate 10. For example, the polysilicon semiconductor layer 20, the first insulating film 22, the gate electrode 24, the second insulating film 25, the source electrode 26 and the drain electrode are provided. 28.

  The thin film transistor 18 is covered with a third insulating film (planarizing film) 29. The planarizing film 29 is a layer made of an insulating material, and is formed between the first substrate 10 and the pixel electrode 34, so that there is an electrical connection between adjacent thin film transistors 18 and between the thin film transistors 18 and the pixel electrodes 34. Insulated.

  A scan electrode 30 is formed on the planarizing film 29, and a pixel electrode 34 is formed on the scan electrode 30 via a fourth insulating film 32. The pixel electrode 34 is an electrode formed for each pixel P in order to drive a liquid crystal 36 described later. In addition, although the pixel electrode 34 in this embodiment is located in the 2nd board | substrate 12 side rather than the scanning electrode 30, the positional relationship may be reverse. The pixel electrode 34 is connected to the thin film transistor 18 through a contact hole 34a.

  On the pixel electrode 34, the 2nd board | substrate 12 is arrange | positioned through the 1st alignment film 35a, the liquid crystal 36, and the 2nd alignment film 35b. With such a configuration, the pixel electrode 34 forms an electric field with the scanning electrode 30 as a counter electrode. The orientation of the liquid crystal 36 is controlled by an electric field generated between the scanning electrode 30 and the pixel electrode 34.

  The second substrate 12 is, for example, a color filter substrate, on which a color filter and a black matrix (not shown) are formed. A detection electrode 38 and a dummy electrode 39 to be described later are formed on the second substrate 12, and a front panel 46 is attached on the detection electrode 38 and the dummy electrode 39 via an adhesive layer 44.

  Hereinafter, the details of the configuration of the detection electrode 38 and the dummy electrode 39 will be described. FIG. 3 is a partial enlarged view of region III of the touch panel 42 shown in FIG. For convenience of explanation, descriptions other than the detection electrode 38 and the dummy electrode 39 are omitted in FIG. The detection electrode 38 is an electrode that detects the presence or absence of external contact with the front panel 46 based on the difference in capacitance between the detection electrode 38 and the scanning electrode 30.

  When the region where the detection electrode 38 is formed is defined as a detection electrode formation region 138, the detection electrode 38 (detection electrode formation region 138) extends in the Y direction, and a plurality of detection electrodes 38 adjacent in the X direction are spaced apart from each other. Are lined up. The detection electrode 38 is made of a light-transmitting conductive material such as ITO (Indium Tin Oxide).

  The dummy electrodes 39 are electrically independent electrodes made of the same material as the detection electrodes 38 and formed in a plurality between the adjacent detection electrodes 38. Assuming that a region where the plurality of dummy electrodes 39 are formed between the detection electrodes 38 is a dummy electrode formation region 139, the dummy electrode formation region 139 extends in the Y direction and is between the adjacent detection electrodes 38. Fill.

4 is a partially enlarged view of the IV region of the touch panel 42 shown in FIG. For convenience of explanation, descriptions other than the detection electrode 38, the dummy electrode 39, and the pixel P are omitted in FIG. As shown in FIG. 4, a plurality of pentagonal holes 38b having five corners 38a in a plan view are arranged in a matrix in the detection electrode 38 so as to be separated from each other. In addition, the number of the corners 38a should just be five or more, and the hole 38b becomes polygonal shape which has the five or more corners 38a by planar view. By having such a configuration, the sides 38c of the hole 38b is at least partially not line up parallel to the outer periphery P ₁ in plan view the shape rectangular pixel P, and extend in a direction crossing.

  Each of the plurality of dummy electrodes 39 formed in the dummy electrode formation region 139 has a polygonal shape that is the same as the shape of the hole 38 b of the detection electrode 38. Specifically, the dummy electrode 39 has five corners 39b and five sides 39c like the hole 38b. The “same polygonal shape” in the present embodiment includes not only the completely identical polygonal shape but also those that deviate from the same shape within a range of errors due to the manufacturing process.

The touch panel 42 and the liquid crystal display device 1 according to the present embodiment have this configuration, so that the holes of the detection electrodes 38 are compared to the touch panel or the liquid crystal display device having the detection electrodes in which rectangular holes or groove-shaped holes are formed. periphery _{P 1} of each side 38c and pixel P of 38b, and the outer peripheral _{P 1} of each side 39c and pixel P of the dummy electrode 39 is prevented from arranged in parallel.

  Therefore, compared with a touch panel or a liquid crystal display device that does not have this configuration, light emission from the pixel P is prevented from being reflected on each side 38c of the detection electrode 38 and each side 39c of the dummy electrode 39 and traveling in the same direction. It is. This prevents the pattern of the detection electrode 38 and the dummy electrode 39 from being visually recognized from the outside of the touch panel 42. Further, since each side 38c of the detection electrode 38 and each side 39c of the dummy electrode 39 are prevented from being arranged in parallel continuously, the occurrence of moire can be suppressed.

  As described above, the touch panel 42 and the display device 1 in the present embodiment can realize prevention of deterioration in the visibility of an image displayed via the touch panel 42.

  Further, since the shape of the hole 38b of the detection electrode 38 in a plan view is a polygonal shape, it is possible to prevent the light reflected from the side surface of the hole 38b from being collected at one point. For this reason, the difference in visibility between the detection electrode 38 and the dummy electrode formation region 139 is suppressed.

  Note that the detection electrode 38 and the dummy electrode 39 are preferably formed by photolithography. By forming the detection electrode 38 and the dummy electrode 39 by photolithography, the pattern becomes high definition, and the above-described effects can be obtained more effectively.

Radius _{d 1} of the holes 38b detection electrode 38 (the radius _{d 1} of the dummy electrode 39) is preferably 5μm or 250μm or less. By radius d ₁ is 5μm or more 250μm or less, prevents the the hole 38b and the dummy electrode 39 of the detecting electrode 38 is visually recognized, and can maintain the accuracy of the plan view shape of the opening 38b and the dummy electrodes 39 it can.

Moreover, _(the dummy electrode 39 distance between d _{2 adjacent)} the distance d ₂ of the holes 38b of the adjacent detection electrodes 38 are formed in a size a and the size viewing is prevented of the processable range Specifically, it is preferably 5 μm or more and 250 μm or less. By the distance _{d 2} is 5μm or more 250μm or less, visible holes 38b and the dummy electrode 39 of the detecting electrode 38 is prevented, and it is possible to suppress the electrical resistance of the sensing electrode 38.

Further, a distance d ₂ of the holes 38b of the adjacent detection electrodes 38 _(distance d ₂ between the dummy electrode 39 _adjacent), the length of the length L ₁ and short sides of the long sides of the pixel P in plan view L ₂ is preferably different. The touch panel 42 and the liquid crystal display device 1 according to the present embodiment have such a configuration, so that each side 38c of the hole 38b and the outer periphery P _{1 of the} pixel P, and each side 39c of the dummy electrode 39 and the outer periphery of the pixel P. P ₁ is prevented from arranged in parallel. For this reason, generation | occurrence | production of a moire can be suppressed.

  The plurality of holes 38b of the detection electrode 38 and the plurality of dummy electrodes 39 are preferably in a continuous and uniform arrangement. Specifically, assuming that the boundary between the detection electrode formation region 138 and the dummy electrode formation region 139 is the boundary B, the shape S formed by the hole 38b and the dummy electrode 39 adjacent to each other across the boundary B is a hole in a plan view. It becomes the same polygonal shape as 38b and the dummy electrode 39.

  As a result, the polygonal planar shape formed by the holes 38b or the dummy electrodes 39 is continuously and uniformly arranged from the detection electrode formation region 138 to the dummy electrode formation region 139. With such a configuration, as shown in FIG. 4, the outer periphery 38 d on the dummy electrode 39 side of the detection electrode 38 does not have a linear shape, but a part thereof forms a shape S.

  By having such a configuration, the touch panel 42 and the display device 1 in the present embodiment can prevent light from the pixel P from being reflected in one direction on the outer periphery 38 d of the detection electrode 38. For this reason, the visual recognition of the boundary B can be prevented.

Further, in the outer peripheral 38d, regions 38d ₁ of toward hole 38b from the boundary B is preferably curved. By region 38d ₁ of the curved shape on the outer circumference 38d are formed, interference of light is suppressed at the outer 38d. The region 38d _1, in the formation of the detection electrode 38 and the dummy electrode 39 may be a curved shape by adjusting the photolithography conditions and etching conditions.

  In the detection electrode formation region 138, the ratio of the total area of the plurality of holes 38b to the area of the detection electrode 38 is preferably not less than two-thirds and not more than three-half. The closer it is, the better.

  More specifically, the detection electrode formation region 138 includes the detection electrode 38 and the hole 38b, but the ratio of the total area of the plurality of holes 38b to the area of the detection electrode 38 is within the above range. The ratio of the area of the detection electrode 38 to the hole 38b in the detection electrode formation region 138 is in the range of 3: 2 to 2: 3.

  Further, since the plan view shape of the hole 38b and the plan view shape of the dummy electrode 39 are equal, by having such a configuration, the ratio of the total area of the dummy electrode 39 to the area of the detection electrode 38 per the same area is also increased. More than two-thirds and less than three-half.

  By having such a configuration, the area ratio of the detection electrode 38 and the dummy electrode 39 within the same area is within a certain range from 1: 1. Thereby, compared with the touch panel and liquid crystal display device which do not have this structure, the touch panel 42 and the liquid crystal display device 1 in this embodiment become difficult to produce a difference in visibility. For this reason, the difference in light and shade between the detection electrode 38 and the dummy electrode formation region 139 becomes difficult to be visually recognized, and it is possible to realize a reduction in the visibility of an image displayed through the touch panel 42.

In addition, when the distance between the center _{c 1} of the adjacent hole 38b, a center _{c 2} Distance _{d 3} the distance between adjacent dummy electrodes 39, the distance _{d 3} in the respective holes 38b, and each of the dummy electrodes The distance d _{3 at} 39 is preferably equal.

  With this configuration, the holes 38b are arranged closest to the detection electrodes 38, and the dummy electrodes 39 are arranged closest to each other in the dummy electrode formation region 139. For this reason, the touch panel 42 and the liquid crystal display device 1 in the present embodiment are larger in the area of the detection electrode 38 and the proportion of the dummy electrode 39 in the dummy electrode formation region 139 than the touch panel and the liquid crystal display device that do not have this configuration. Is easy to adjust. Moreover, since the distance between the adjacent holes 38b becomes equal, the electrical resistance in the detection electrode 38 can be suppressed.

Hereinafter, modified examples of the touch panel 42 in the present embodiment will be described. FIG. 5 is a partially enlarged view showing a modification of the touch panel 42 according to this embodiment in the same field of view as FIG. As shown in FIG. 5, the hole 38b may have a hexagonal shape having six corners 38a in a plan view. Similarly, the dummy electrode 39 has a hexagonal shape having six corners 39a. By having such a configuration, at least four sides 38c of the hole 38b, at least four sides 39c of the dummy electrodes 39 are not line up parallel to the outer periphery P ₁ of the pixel P, and extend in a direction intersecting .

For this reason, the touch panel 42 and the liquid crystal display device 1 in this embodiment are compared with a touch panel or a liquid crystal display device that does not have this configuration, each side 38c of the hole 38b, the outer periphery P _{1 of the} pixel P, and the dummy electrode 39. periphery P ₁ of each side 39c and pixel P of is prevented that arranged in parallel. For this reason, generation | occurrence | production of a moire can be suppressed and the fall of the visibility of the image displayed via the touch panel 42 can be implement | achieved.

FIG. 6 is a partially enlarged view showing a modification of the touch panel 42 according to the present embodiment in the same field of view as FIG. As shown in FIG. 6, the hole 38b and the dummy electrode 39 may have a heptagon shape having seven corners 38a and 39a, respectively. Thus, by the plan view shape of the opening 38b and the dummy electrode 39 has a polygonal shape having an odd number of corners 38a, 39a, of the sides 38c of the hole 38b, side parallel to the outer periphery _{P 1} of the pixel P Is at most one.

Similarly, sides parallel to the outer periphery P ₁ of the pixel P out of the sides 39c of the dummy electrode 39 is made of one at most. For this reason, generation | occurrence | production of a moire is suppressed compared with the touchscreen or liquid crystal display device which does not have this structure in the touchscreen 42 and the liquid crystal display device 1 in this embodiment. Thereby, prevention of the fall of the visibility of the image displayed via the touch panel 42 is realizable.

  FIG. 7 is a partially enlarged view showing a modified example of the touch panel 42 according to the present embodiment in the same field of view as FIG. As shown in FIG. 7, the hole 38b and the dummy electrode 39 may have an octagonal shape having eight corners 38a and 39a, respectively.

  FIG. 8 is a partially enlarged view showing a modification of the touch panel 42 according to the present embodiment in the same field of view as FIG. The hole 38b and the dummy electrode 39 shown in FIG. 8 have a dodecagonal shape having twelve corners 38a and 39a, respectively. Thus, the number of corners 38a and 39a is not limited to the above-described example as long as it is 5 or more, and may be a larger number.

FIG. 9 is a partially enlarged view showing a modification of the touch panel 42 according to the present embodiment in the same field of view as FIG. The holes 38b and the dummy electrodes 39 in FIG. 9 are visually recognized as circular in plan view by increasing the number of corners 38a and 39a, respectively. Since the touch panel 42 and the liquid crystal display device 1 in the present embodiment have such a configuration, each side 38c of the hole 38b and the outer periphery P _{1 of the} pixel P are compared with a touch panel or a liquid crystal display device that does not have this configuration. , and may be the outer peripheral P ₁ of each side 39c and pixel P of the dummy electrode 39 is to minimize the portion arranged in parallel. For this reason, it can suppress that the pattern of the detection electrode 38 or the dummy electrode 39 is visually recognized, and generation | occurrence | production of a moire.

  The arrangement of the plurality of holes 38b and the plurality of dummy electrodes 39 in the detection electrode 38 has been described above. However, the holes 38b and the dummy electrodes 39 may have other arrangements as long as the shapes in plan view are the same. FIG. 10 is a partially enlarged view showing a modification of the touch panel 42 according to the present embodiment in the same field of view as FIG. As shown in FIG. 10, the plurality of holes 38b and the plurality of dummy electrodes 39 do not have to be arranged closest to each other.

  Next, details of the configuration of the touch panel 42 in the non-display area E will be described. 11 is a partially enlarged view of the XI area of the touch panel 42 shown in FIG. 3, and FIG. 12 is a partially enlarged view of the XII area of the touch panel 42 shown in FIG.

  In the non-display area E, a shield electrode 47 connected to the shield terminal 41 is formed so as to extend in the Y direction. The shield electrode 47 is an electrode composed of a first region 48 that is a region on the display region D side and a second region 49 that is a region outside the first region 48. The first area 48 is formed along the boundary F between the display area D and the non-display area E. The first region 48 is formed in the entire region corresponding to the non-display region E.

  In the first region 48, like the detection electrode 38, holes 48b having the same planar view shape as the holes 38b are formed in a matrix. Thereby, the first region 48 has the same planar view shape as that of the detection electrode 38.

  In the touch panel 42 and the liquid crystal display device 1 in the present embodiment, a shield electrode 47 (first region 48) having a plurality of holes 48 b is formed along the boundary F in a region corresponding to the non-display region E of the touch panel 42. Therefore, it is possible to suppress the light / dark difference in the non-display area E when the non-display area E is viewed from the outside of the touch panel 42.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. For example, the configuration described in the above-described embodiment may be replaced by a configuration that has substantially the same configuration, a configuration that exhibits the same operational effects, or a configuration that can achieve the same purpose.

  For example, in the present embodiment, the touch panel 42 of the present invention is applied to the in-cell type liquid crystal display device 1 using the common electrode as the scanning electrode 30, but the present invention is not limited to the in-cell type, and the second substrate 12 can be applied to an on-cell method in which both the scan electrode 30 and the detection electrode 38 are formed on the substrate 12, and a method in which a substrate on which the scan electrode and the detection electrode are formed is stacked on the display device. Further, the touch panel 42 of the present invention may be applied to a display device other than the liquid crystal display device 1 (for example, an EL (Electro Luminescence) display device).

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device, 10 1st board | substrate, 10a upper surface, 12 2nd board | substrate, 12a upper surface, 18 thin-film transistor, 30 scan electrode, 34 pixel electrode, 36 liquid crystal display panel, 38 detection electrode, 38a angle | corner, 38a hole, 38c edge, 38d outer periphery, 38d ₁ region, 39 dummy electrode, 40 terminals, 41 shield terminal, 42 touch panel, 46 front panel, 47 shield electrode, 48 first region, 48b hole, 49 second region, 138 detection electrode formation region, 139 dummy Electrode forming area, B boundary, BM black matrix, D display area, E non-display area, F boundary, P pixel, P ₁ outer periphery, S shape.

Claims (7)

A plurality of scan electrodes;
A plurality of polygonal holes, which are formed on a plane different from the scan electrodes intersecting with the plurality of scan electrodes and having five or more corners in a plan view, are arranged in a matrix so as to be separated from each other. A sensing electrode;
A plurality of electrically independent dummy electrodes made of the same material as the detection electrodes, formed between the adjacent detection electrodes;
With
The plan view shape of each of the plurality of dummy electrodes is the shape of the polygonal hole,
A touch panel characterized by that. The touch panel according to claim 1,
The plurality of polygonal holes of the detection electrodes and the plurality of dummy electrodes are a continuous and uniform array.
A touch panel characterized by that. The touch panel according to claim 1 or 2,
The polygon is visually recognized as a circular shape when the number of the corners is increased.
A touch panel characterized by that. The touch panel according to any one of claims 1 to 3,
In the detection electrode formation region, which is a region where the detection electrode is formed,
The ratio of the area of the plurality of polygonal holes to the area of the detection electrode is not less than 2/3 and not more than 3/2.
A touch panel characterized by that. The touch panel according to any one of claims 1 to 4,
The distances between the centers of adjacent polygons are equal,
A touch panel characterized by that. A touch panel according to any one of claims 1 to 5,
A shield electrode that is an electrode in which the plurality of polygonal holes are formed outside a display region in which the detection electrode is formed;
A touch panel characterized by that. A touch panel according to any one of claims 1 to 6,
A pixel electrode for forming an electric field using the scanning electrode as a counter electrode;
A liquid crystal whose orientation is controlled by the electric field;
A liquid crystal display device comprising:

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